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The suit gave publicity to anti-dissection advocates. Graham appeared in a 1987 Apple Computer commercial for the virtual-dissection software Operation Frog. [45] [46] The state of California passed a Student's Rights Bill in 1988 requiring that objecting students be allowed to complete alternative projects. [47]
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This practice is declining due to animal welfare concerns, and "digital frogs" are now available for virtual dissection. [222] Frogs have served as experimental animals throughout the history of science. Eighteenth-century biologist Luigi Galvani discovered the link between electricity and the nervous system by studying frogs.
The character Michigan J. Frog is twice discovered inside the cornerstone of a razed building. [18] A reference to the phenomenon occurs in Dante Gabriel Rossetti's poem "Jenny", which mentions a "toad within a stone / Seated while time crumbles on". [7]
A fully distended vocal sac in an Australian red-eyed tree frog (Litoria chloris) Italian tree frog (Hyla intermedia) with an inflated vocal sac. The vocal sac is the flexible membrane of skin possessed by most male frogs and toads. The purpose of the vocal sac is usually as an amplification of their mating or advertisement call.
The African clawed frog or platanna, Xenopus laevis, was first widely used in laboratories in pregnancy assays in the first half of the 20th century.When human chorionic gonadotropin, a hormone found in substantial quantities in the urine of pregnant women, is injected into a female X. laevis, it induces them to lay eggs.
He did not speak a word until he was five years old and in high school excelled only in frog dissection and football. According to his dating profile, Nathan describes his ethnicity as "White/Native American". He was raised in New Port Richey, Florida. He is the lead songwriting force in Dethklok, and uses violent imagery or plot elements when ...
Malpighi's frog dissection in 1661, proved to be a suitable size that could be magnified to display the capillary network not seen in the larger animals. [16] In discovering and observing the capillaries in the frog's lungs, Malpighi studied the movement of the blood in a contained system. [15]